US6349988B1 - Vehicle with large planar composite panels - Google Patents

Abstract

A vehicle with large side panels includes composite panels that are lightweight and economical to manufacture. A superstructure has a plurality of attached composite panels. In one embodiment, the superstructure has grooves for receiving the composite panels. The composite panels preferably fit together via a tongue and groove configuration. Alternatively, the superstructure has support beams that have threaded receiving holes. Each composite panel then includes threaded inserts aligned with the receiving holes and that attach to the receiving holes. In both embodiments, each composite panel preferably includes at least an outer colored layer, a sheet of polymeric material attached to the colored layer and an inner layer attached to the polymeric material. Other layers can be added depending upon the use of the vehicle. For instance, a layer of insulating foam can be added if the vehicle is to be refrigerated. Further, an additional structural support layer can be added to increase the strength of the walls.

Description

BACKGROUND OF THE INVENTION

This invention generally relates to lightweight body panels used in vehicles having large generally planar panels.

Many vehicles including large trucks, trailers, vans, etc. have large generally planar side panels. Currently, the panels are made of sheets of metal or perhaps plywood attached to a metal superstructure. The metal sheets are typically galvanized steel or stainless steel, Plastic sheet molding compound may be added to the exterior of the assembled superstructure. However, the plastic sheet molding compound needs to be painted. This added step increases the complexity of the assembly and the cost to manufacture the vehicle.

There are several disadvantages to this current manufacturing process. The process is very labor intensive. Further, the panels are very heavy. The heavier the vehicle, the less cargo that can be hauled since there are weight restrictions to preserve and protect the roads.

Therefore, there is a need for more lightweight panels for vehicles to maximize the quantity of goods that can be hauled. There is also a need to simplify the construction and minimize the cost of producing the vehicles.

SUMMARY OF THE INVENTION

A disclosed vehicle uses composite panels to overcome the above problems of standard vehicles made from sheet metal or plywood. In general terms, this invention discloses a lightweight vehicle panel for vehicles having large planar side panels, such as freight trailers, recreational vehicle trailers, step vans, etc. The vehicles preferably include a superstructure and a plurality of layered composite panels that attach to the superstructure.

Each composite panel preferably includes an outer colored layer, a polymeric material attached to the outer colored layer and an inner layer attached to the polymeric material. The panels can also contain more layers as needed for its end use. For instance, a layer of insulating foam can be added. Also, an added layer of structural support can be added anywhere between the outer colored layer and the inner layer. Further, multiple layers of any desired material can be included in each composite panel to meet any required specification.

Preferably, the superstructure includes grooves for receiving the composite panels and the composite panels fit together by a tongue and groove configuration. Alternatively, the superstructure includes support beams having receiving holes. Each composite panel may include threaded inserts aligned with the receiving holes for attachment to the receiving holes.

There are several advantages to using the composite panels of the present invention. Since the panels are made primarily from polymeric materials, they are much lighter than sheet metal. Further, the composite panels do not absorb water like plywood. The panels and superstructure of the present invention are easy to manufacture and assemble compared to the current method of forming the sheet metal and riveting all the pieces together. As a result, the composite panels are less expensive to manufacture. Also, it is less expensive to operate vehicles using the composite panels because the vehicle can haul a heavier load.

These and other features of the invention may be best understood from the following specification and drawings. The following is a brief description of the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an elevational view of a trailer of the present invention attached to a tractor cab.

FIG. 2 is a cutaway view alongline2—2 of FIG.1.

FIG. 3 is a top view of the preferred embodiment showing one attachment method for fitting the composite panels together.

FIG. 4 is a cross-sectional view of one embodiment of a composite panel.

FIG. 5 is a perspective view of an alternative embodiment, showing an alternate attachment method for the panel, shown on a trailer that is attached to a tractor cab.

FIG. 6 is a perspective view of the alternative embodiment of FIG. 5 showing the alternate attachment method for the composite panel.

FIG. 7 is a cross-sectional view of an alternative embodiment of a composite panel.

FIG. 8 is a flowchart diagram illustrating the method of making the composite panels and trailer.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 illustrates a vehicle trailer, shown generally at20, being hauled by atractor cab22. Thetrailer20 includes asuperstructure24 and a plurality oflayered composite panels26 attached to thesuperstructure24. Thesuperstructure24 is preferably made of metal but could alternatively be made from a polymer.

Preferably, as shown in FIG. 2, thesuperstructure24 hasgrooves28 for receiving thecomposite panels26. Thecomposite panels26 will form the walls of thetrailer20. Further, thecomposite panels26 fit together by a tongue and groove arrangement. For example, as shown in FIG. 3, eachcomposite panel26 has a first edge30 and a second edge32. Eachpanel26 has a tongue34 positioned along its first edge30 and a groove36 positioned along its second edge32.

Specifically, afirst panel26A is positioned in thegrooves28 of thesuperstructure24 to begin forming the walls of thetrailer20. Next, asecond panel26B is positioned in thegrooves28 of thesuperstructure24. Thesecond edge32A of thefirst panel26A abuts afirst edge30B of asecond panel26B. Specifically, thegroove36A of thefirst panel26A receives thetongue34B of thesecond panel26B. This continues withother panels26 until the walls of thetrailer20 are complete.

As shown in FIG. 4, preferably, eachcomposite panel26 includes an outercolored layer38, a sheet ofpolymeric material40 attached to thecolored layer38, and aninner layer42 attached to thepolymeric material40. Different types of materials can be used for each of the layers.

The outercolored layer38 is preferably made from a paintless polymer film. Alternatively, a prepainted metal, like aluminum could be used. No painting is required if either of these materials is used as theouter layer38. Alternatively, an unpainted metal could be used as theouter layer38. Preferably, theouter layer38 is positioned in thetrailer20 facing outward.

There are also many options for thepolymeric material40. For instance, the polymeric material can be reinforced. The reinforcements can include reinforcing fibers, integrated support ribs that are molded into the component, or an external framework molded into the material. Further, there is great flexibility with the polymeric material in terms of its thickness.

There are also many options for theinner layer42. However, the selected material depends on the function of the trailer. For example, metal could be used for theinner layer42. The metal could be stainless steel, an unpainted metal, or a prepainted metal. A stronger material, like metal, would be used to contain the contents of the trailer and prevent them from breaking through the wall. Another layer of a polymeric material could be used as theinner layer42 including a paintless film or a textured film. Finally, any type of interior décor could be used including, but not limited to, cloth or wallpaper.

Analternative embodiment trailer44 is shown in FIG. 5 being hauled by atractor cab46. Similar to the preferred embodiment, thefreight trailer44 includes asuperstructure48 and a plurality of layeredcomposite panels50 attached to thesuperstructure48.

Preferably, thesuperstructure48 has support beams52. Eachsupport beam52 preferably has at least one threaded receivinghole54. As shown in FIG. 6, eachcomposite panel50 includes threadedinserts56 that are aligned with the receiving holes54. The threaded inserts56 engage with the threaded receivingholes54 to connect thepanels50 to thesuperstructure48.

Theinserts56 can be made from either metal or plastic. Further, theinserts56 are preferably molded into thecomposite panels50.

Also shown in FIG. 6 is anelectrical outlet55 and a layer of wiring conduit57 for holdingwires59, shown partially in phantom, that run throughout thetrailer20,44.

As shown in FIG. 7, preferably, each composite panel includes the same layers that were disclosed in the FIG. 4 embodiment, including an outercolored layer38, a sheet ofpolymeric material40 and aninner layer42. However, other layers can be added to the composite panels. Some or all of the following options can be used. For instance, a layer of insulatingfoam58 can be added and/or an additionalstructural support layer60 can also be included in the composite panel. A layer can also be added to act as a vapor barrier.

A thermal insulating foam can be used if the trailer will be refrigerated. The insulating foam can be fiberglass insulation. Alternatively or additionally, depending upon the end user's requirements, an acoustical foam can be used. Also, the thickness of the insulating foam can be adjusted according to the end user's requirements.

A separatestructural support layer60 can be added to the panel. Alternatively,support ribs43 can be molded directly into the panel. Additional structural support may be necessary to prevent the contents in the trailer from breaking through the panels when the vehicle turns.

A wire conduit layer can be included in the composite panel. Electrical outlets can also be molded into the composite panels. Preferably, the electrical outlets face the interior of the trailer. All of these layers can be used with either the FIG. 4 panels or the FIG. 6 panels.

It is important to note that any of the panels can be used with freight trailers, recreational trailers, step vans, or any other vehicles having large planar side panels.

FIG. 8 schematically illustrates the method of forming a composite panel for a vehicle. Theflow chart120 includes a first step at122 where a sheet of colored material is placed in a fast halve of a mold. At124, an inner layer of material is placed into a second halve of a mold. At126, a polymeric material is injected into the mold. The polymeric material, colored material and inner layer of material are molded into a solid, generally flat component wherein the colored material and the inner layer of material adhere to the molded polymeric material at128. At130, a layer of insulation is injected into the mold. The component could be cured at this point. At132, a structural support material is injected into the mold. The component could be cured again at this point. At134, the component is mounted to a vehicle superstructure. Other molding techniques can be used. As an example, rather than plug panels in the mold, a multi-shot molding process can be used. Further, wiring conduit and electrical outlets can be added during the molding process.

The invention has been described in an illustrative manner, and it is to be understood that the terminology that has been used is intended to be in the nature of words of description rather than of limitation. Modifications and variations of the examples described above are possible and it must be understood that such changes may be within the scope of the following claims. In other words, the invention may be practiced otherwise than as specifically described above.

Claims (30)

What is claimed is:

1. A vehicle comprising:

a superstructure; and

a plurality of layered composite panels attached to said superstructure wherein each of said layered composite panels comprises an outer colored layer formed from a paintless polymer film and a sheet of polymeric material attached inwardly of said outer colored layer.

2. The vehicle ofclaim 1 further comprising a layer of insulating foam.

3. The vehicle ofclaim 2, further comprising a structural support layer.

4. The vehicle ofclaim 1, wherein said superstructure has grooves for receiving said composite panels and said composite panels fit together by a tongue and groove arrangement.

5. The vehicle ofclaim 1, wherein said superstructure has support beams including receiving holes and each said composite panel includes inserts aligned with said receiving holes for attaching to said receiving holes.

6. The vehicle ofclaim 5, wherein said receiving holes and said inserts are both threaded.

7. The vehicle ofclaim 1, further comprising wiring conduit integrated into said composite panels.

8. The vehicle ofclaim 7, further comprising electric outlets attached to said panels.

9. The vehicle ofclaim 1 wherein each said composite panel includes reinforcing ribs.

10. A vehicle comprising:

a superstructure; and

a plurality of layered composite panels wherein each said panel includes an outer colored layer formed from a paintless polymer film, a sheet of polymeric material attached to said outer colored layer, a structural support layer attached to said polymeric material, an insulating foam layer attached to said structural support layer, and an inner layer attached to said insulating foam.

11. The vehicle ofclaim 10, wherein said superstructure has grooves for receiving said composite panels and said composite panels fit together by a tongue and groove arrangement.

12. The vehicle ofclaim 10, wherein said superstructure has support beams including receiving holes and said composite panel includes inserts aligned with said receiving holes for attaching to said receiving holes.

13. The vehicle ofclaim 12, wherein said receiving holes and said inserts are both threaded.

14. The vehicle ofclaim 10, wherein said composite panel further comprises integrated wiring conduit.

15. The vehicle ofclaim 10, wherein said composite panel further comprises integrated electric outlets connected to said inner layer.

16. A vehicle comprising:

a superstructure,

at least one panel for attachment to said superstructure to form the walls of a vehicle trailer each panel including an outer colored layer; and

a sheet of polymeric material integrally molded to said colored layer as one piece to form a single panel wherein said outer colored layer is comprised of a paintless polymer film to form a finished outer wall portion of the trailer.

17. The vehicle ofclaim 16, including an inner layer molded to said sheet of polymeric material on an opposite side from said paintless polymer film to form an inner wall portion of the trailer.

18. The vehicle ofclaim 17, wherein said inner layer is polymeric material.

19. The vehicle ofclaim 16 including a male mount on one side of the panel for engaging a first adjacent panel and a female mount on an opposite side of the panel for engaging a second adjacent panel.

20. The vehicle ofclaim 19, wherein said male mount is comprised of a tongue and said female mount is comprised of a groove.

21. A vehicle comprising:

a superstructure defining a support frame having a plurality of trailer panel support sections;

a plurality of composite panels mounted within said trailer panel support sections, said panels each being formed from an outer colored layer and a sheet of polymeric material integrally molded to said colored layer as one piece wherein said outer colored layer is comprised of a paintless polymer film to form a finished outer surface for said panel.

22. The vehicle ofclaim 21, wherein said polymeric material is comprised of a fiber-reinforced polymer.

23. The vehicle ofclaim 21, including an inner layer molded to said sheet of polymeric material on an opposite side from said outer colored layer to form an inner surface of said panel.

24. The vehicle ofclaim 21, wherein each panel includes a male mount on one side of said panel for connecting to a first adjacent panel and a female mount on an opposite side of said panel for engaging a second adjacent panel.

25. The vehicle ofclaim 24, wherein said male mount is comprised of a tongue and said female mount is comprised of a groove.

26. The vehicle ofclaim 21, wherein said outer colored layer and a sheet of polymeric material are molded within a common mold to form each of said panels.

27. The vehicle ofclaim 21 wherein trailer panel support sections are formed from support beams having a plurality of receiving holes and wherein each of said panels includes a plurality of inserts that align with said receiving holes to attach said panels to said superstructure to form the trailer.

28. The vehicle ofclaim 27 wherein said inserts are integrally molded with said panel as one piece.

29. The vehicle ofclaim 21 including at least one electrical outlet and wiring conduit molded within at least one of said panels.

30. The vehicle ofclaim 21 including a plurality of support ribs molded into said panels.

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